<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
       <style>
           .one{
                background-color: red;
               width: 100px;
               /*父控件最右边*/
               float: right;

           }
           .two{
               background-color: yellow;
               width: 90px;
               /*父控件最左边*/
               float: left;
           }


       </style>
</head>
<body>
    <div class="one">oneoneone</div>
    <div class="two">two</div>
    <div>333333</div>


</body>
</html>